1kbq

Complex of Human NAD(P)H quinone Oxidoreductase with 5-methoxy-1,2-dimethyl-3-(4-nitrophenoxymethyl)indole-4,7-dione (ES936)
(see also NADH quinone oxidoreductase (NQO1) with inhibitor dicoumarol)



The quinone ES936 causes irreversible inhibition of the NQO1. Alignment of the hNQO1 dimer in complex with ES936 (red) (1kbq) with the hNQO1−dicoumarol complex (2f1o) yields 0.45Å RMSD for the 546 Cα atoms. The ES936 causes structural change only in the position of Phe 232. The movement of this residue is smaller than that caused by dicoumarol. The distance between Tyr 128 and Phe 232 in the hNQO1−ES936 complex is only ~7 Å, while in the hNQO1−dicoumarol complex it is ~12 Å.

About this Structure
1KBQ is a 4 chains structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.